Can you take a few moments to answer these questions about your XITE-1 computer set up. I would like to keep the discussion minimal, so that it will be easier to tally up what seems to work and what doesn't. Here are the questions:

Currently running (finally) Scope PCI and Xite in parallel.
Getting occasional DSP overflow errors on Xite side (go figure) due to I presume having too many boards for my older motherboard to handle - and/or there is still an IRQ conflict between Xite and my Nvidia card.

Otherwise performance is great, and it's stable.

Today I rip out the old SRB in order to MAYBE get Xite to migrate to it's own IRQ.

The motherboard i have is not compatible with XITE-1. I get freezing, slow movement, crashing and whatever other bad things that exist, quite often. The MB i have and XITE-1 are definitely not a working set-up. Below is my specs. I will try a different MB soon.

Here's mine. Also a Gigabyte X58 motherboard. Also is flaky, with occasional stutter, freeze, BSOD. This only happens when the Xite-1 driver is installed and enabled. With the driver disabled, even though the Xite PCIe card is still installed, the computer is back to its normal cheerful, stable operation. Which makes me hopeful that S/C will be able to fix this with a driver update.

...but that's how it is in PCs from XP on, you really don't get to set your own interrupts. It has to be dealt with in the driver as far as I can tell. I didn't take out or shut down the wireless card because I need it, but I did switch cards around to different slots. Didn't seem to matter much and the IRQ assignments didn't change.

Your list makes me wonder if you have ACPI installed, or is it Standard PC? Are you able to see any IRQs above 16, up to 23 in your list? If not, that would explain why you don't see the IRQ shift when you swap slots as well.

Have you told 'the gents?' - We are still in RC mode.
They just sent me a dsp dll update the other day that stabilized things considerably - especially when running both PCI and Xite concurrently.
(they should probably post it here)

The PCIe card is in the slot nearest the graphics card. I started in the slot farthest away (system didn't see XITE), moved to the second slot (shared IRQ16 with graphics card, didn't test to see if there was a problem), and disabled the USB Port which shared the IRQ when I moved to the final slot by the graphics card. XITE is now sharing with a PCIe root, which I assume is the one that it is installed into and is okay.

System is very stable. I get DSP Optimization errors if I start to get crazy with the polyphony even though the overall load is only about 30%, but I suspect that is partly user error as I get the DSP assignment tricks sorted out.

EDIT: After getting some intermittent power-on errors, and having some other glitches, I followed garyb/XITE-1/4Live's advice and moved it back to the middle slot which shares IRQ16. Back to stability, nearly all glitches are gone! Plus, the most recent release (2609) has helped improve the DSP Optimization errors a lot.

I switched Motherboards awhile back since my x58 Gigabyte UD4P was incompatible with XITE-1. I now have the ASUS Rampage II Extreme X58 Motherboard and it works very well with XITE-1. I've had this MOBO for about 2 months now and all is good, this is a working set-up. My system specs are below.